Answer / vijay

If we want to validate more than one field in the selection
screen, then we can use this chain and endchain. Normally,
if u dont use this then, if one of the field in selection
screen is not properly entered it wont allow u to enter the
remaining fields. But if we use chain and endchain, even if
one of the field is not entered correctly it will allow u to
enter the remaining fields.

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